The European Tribune is a forum for thoughtful dialogue of European and international issues. You are invited to post comments and your own articles.
Please REGISTER to post.
Instead, quantum optics has provided esperimental verification of Bell's inequalities, Hardy's theorem, the Kocken-Specker theorem, interaction-free measurement [which is not interaction-free], quantum teleportation [which is not teleportation but subluminal communication]...
There are enough wonders in empirically established quantum mechanics already.
We have met the enemy, and he is us — Pogo
However: I do not know enough physics to know if it is possible; only enough to know how I would try to do it. The basic idea would be to use the difference between the interference patterns that can be generated when particles do not choose, versus the lack of interference pattern that occurs when they are forced to choose. Obviously the particles would be in batches--sequences--long enough to reliably create such patterns.
Of technical problems, there should be many.
Theoretically, it would be very interesting.
The earth is only 21 light-milliseconds across. I don't think it will improve cellphones much.
The Fates are kind.
Any experimental verification of superluminal communication?
And also here.
I can understand the group velocity argument, but what bothers me is that the rationale for 'proving' that superluminal communication can't happen seems very similar to the one that was being used to 'prove' with absolute relativistic certainty that the group velocity has to be less than c.
This doesn't 'prove' anything about what's possible, but it does make me suspicious of the rigour of the arguments that are being used.
Researchers have now measured many group velocities higher than c. "It's just not true what they say in the textbooks," says Raymond Chiao of the University of California at Berkeley. For example, a Gaussian shaped light pulse can travel faster than c through some highly absorbing materials. The explanation is that the central piece of the pulse is attenuated more than the earliest piece. Although the pulse shape is unchanged, it comes out smaller, and the "leading edge" of the input pulse is transformed to become the peak of the emerging pulse, a process called "reshaping." So no part of the pulse is actually transmitted faster than c, says Chiao.
by IdiotSavant - Jan 15 7 comments
by Frank Schnittger - Jan 14 12 comments
by Oui - Jan 13 37 comments
by Frank Schnittger - Jan 8 72 comments
by Oui - Jan 14 7 comments
by Frank Schnittger - Jan 6 68 comments
by Frank Schnittger - Jan 7 10 comments
by Oui - Jan 11 77 comments
by IdiotSavant - Jan 157 comments
by Oui - Jan 147 comments
by Frank Schnittger - Jan 1412 comments
by Oui - Jan 1337 comments
by Oui - Jan 1177 comments
by Oui - Jan 1044 comments
by Frank Schnittger - Jan 872 comments
by Oui - Jan 770 comments
by Frank Schnittger - Jan 710 comments
by Frank Schnittger - Jan 668 comments
by Frank Schnittger - Jan 611 comments
by Oui - Jan 659 comments
by Frank Schnittger - Jan 228 comments
by Frank Schnittger - Dec 3148 comments
by Oui - Dec 3122 comments
by Oui - Dec 2834 comments
by gmoke - Dec 28
by Frank Schnittger - Dec 2718 comments
by Bernard - Dec 2451 comments
by gmoke - Dec 24